The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 11, 2017
Filed:
Jan. 13, 2015
Canon Kabushiki Kaisha, Tokyo, JP;
Taro Murakami, Musashino, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A barrier mechanism of an optical apparatus capable of preventing generation of a gap between barrier blades and an opening part in a closed state without complicating a configuration. Barrier blades are arranged overlapping in an optical axis direction, and are driven by a barrier driving ring to rotate in an opening-and-closing direction for opening and closing the opening part. A barrier barrel is arranged at the outer peripheral side of the barrier driving ring, and holds the barrier blades. The barrier blades includes a main barrier blade that is arranged at an image surface side and is rotatably supported by the barrier barrel with a first shaft, and auxiliary barrier blades that are rotatably supported by a second shaft that is provided on the subject side of the main barrier blade. The first shaft and the second shaft are arranged in parallel but are not coaxial.